package com.leyou.gateway.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

import java.util.List;

@Configuration
public class GlobalCORSConfig {
    @Autowired
    private CORSConfig corsConfig;
    @Bean
    public CorsFilter corsFilter() {
        //1.添加CORS配置信息
        CorsConfiguration config = new CorsConfiguration();
        //1) 允许的域,不要写*，否则cookie就无法使用了
   /*     config.addAllowedOrigin("http://manage.leyou.com");
        config.addAllowedOrigin("http://www.leyou.com");*/
   //优化,原始方式
       /* List<String> allowedOrigins = corsConfig.getAllowedOrigins();
        for (String allowedOrigin : allowedOrigins) {
            config.addAllowedOrigin(allowedOrigin);
        }*/
       //使用方法调用的方式 /lambda表达式
        corsConfig.getAllowedOrigins().forEach(config::addAllowedOrigin);

        //2) 是否发送Cookie信息
       // config.setAllowCredentials(true);
        config.setAllowCredentials(corsConfig.getAllowedCredentials());
        //3) 允许的请求方式
     /*   config.addAllowedMethod("OPTIONS");
        config.addAllowedMethod("HEAD");
        config.addAllowedMethod("GET");
        config.addAllowedMethod("PUT");
        config.addAllowedMethod("POST");
        config.addAllowedMethod("DELETE");*/
     corsConfig.getAllowedMethods().forEach(config::addAllowedMethod);
        // 4）允许的头信息
        //config.addAllowedHeader("*");
       corsConfig.getAllowedHeaders().forEach(config::addAllowedHeader);

        // 5）有效期
        config.setMaxAge(corsConfig.getMaxAge());
       // config.setMaxAge(360000L);

        //2.添加映射路径，我们拦截一切请求
        UrlBasedCorsConfigurationSource configSource = new UrlBasedCorsConfigurationSource();
      //  configSource.registerCorsConfiguration("/**", config);
        configSource.registerCorsConfiguration(corsConfig.getFilterPath(), config);

        //3.返回新的CORSFilter.
        return new CorsFilter(configSource);
    }
}